Spiderman- I grew up reading his comics all the time and i still do, i love the character and the story arcs (looking foward to spider-verse). Many people may think i like him because he's one of the popular ones but i don't think its because of that. The movies are average too me (Amazing Spiderman 2 only good stuff was the electro fight and Gwen's death).
I consider him my favorite character in every Marvel universe game. I love his alternate versions like 2099 and Miles as well as Peter's clone the scarlet Spider. He's definitely my favorite.